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1, the reactor pump The pump reactor directly installed in the nuclear reactor pressure vessel at the bottom of the reactor core to provide cooling water. In order to prevent the water leakage in the reactor, the submersible motor without a shaft sealing structure is used as a drive to improve the reliability. Due to the harsh environment of the reactor, the hydraulic components (impeller and diffuser) are made of a forged material. By NC machining of the blade, pump performance can be reduced. Radial and thrust bearings feature tilting pads with excellent load characteristics and vibration stability. Liquid Metal Pump for Rapid Propagation Reactors This is a circulation pump that delivers the primary coolant (liquid metal) to the FBR reactor core. Is a mechanical vertical centrifugal pump that supplies the sodium cycle of a breeder reactor with a flow rate of up to 10 m3 / min. Reactor Coolant Pumps The reactor coolant pump (hereinafter referred to as the main pump) unit is a cardiac device of a PWR nuclear power plant and is currently used in the world Only a few countries can produce main pumping units. In our country, nuclear power plants (including C1 project but not Qinshan Phase III) have been completed. The main pumps are all shaft-sealed, but there are two kinds of rigid connection and flexible connection. The main pump units produced in the United States, France and Japan belong to The rigid connection, the main pump units produced in Germany, Austria and Russia are all flexible and all the main pumps are imported (the main pump for the C1 project only realizes partial localization of parts). 2, condensate pump, high pressure core overflow pump This is a vertical shaft pump with the shell, some shapes designed according to the pit-shaped, in order to increase the suction pressure of the impeller. The pump is often used in high temperature and high earthquake environment. Condensate pump with double-ended mechanical seal. According to inhalation, the first level with double suction impeller. Waste heat discharge pump 3, circulating pump, sea water pump to the nuclear reactor or steam boiler to send high-temperature water. As the pump is treated with high-temperature water, the shaft seal uses a sleeve seal, because the sleeve seal performance is reliable, saving maintenance costs. Sleeve seal with intermediate extraction and control of fixed drainage temperature method.